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Psychol Med. 2017 Feb;47(3):389-400. doi: 10.1017/S003329171600266X. Epub 2016 Oct 20.

Prenatal maternal bereavement and mortality in the first decades of life: a nationwide cohort study from Denmark and Sweden.

Author information

1
Section for Epidemiology,Department of Public Health,Aarhus University,Aarhus,Denmark.
2
Department of Medicine,Clinical Epidemiology Unit,Solna,Karolinska University Hospital,Karolinska Institute,Stockholm,Sweden.
3
Section for Biostatistics,Department of Public Health,Aarhus University,Aarhus,Denmark.
4
Department of Public Health,Research Unit for General Practice and Section for General Medical Practice,Aarhus University,Aarhus,Denmark.
5
Department of Epidemiology,Fielding School of Public Health,University of California,Los Angeles,CA,USA.
6
Department of Biostatistics,School of Public Health,Fudan University,Shanghai,China.
7
Department of Clinical Epidemiology,Aarhus University Hospital,Aarhus,Denmark.

Abstract

BACKGROUND:

The loss of a close relative is one of the most stressful life events. In pregnancy, this experience has been associated with a higher risk of fetal death and under-five mortality, but little is known about potential effects on long-term mortality in offspring. We examined the association between prenatal maternal bereavement and mortality in a cohort of 5.3 million children followed until up to 37 years of age.

METHOD:

The population-based cohort study included 5 253 508 live singleton births in Denmark (1973-2004) and Sweden (1973-2006). Children born to mothers who lost a child, spouse, sibling, or parent during or 1 year before pregnancy were categorized as exposed.

RESULTS:

Prenatal maternal bereavement was associated with a 10% increased all-cause mortality risk in offspring [mortality rate ratio (MRR) 1.10, 95% confidence interval (CI) 1.03-1.18]. The association was the most pronounced for children of mothers who lost a child/spouse (MRR 1.28, 95% CI 1.14-1.44) and was stronger during the first 10 years of life. Prenatal maternal bereavement may have stronger effects on natural causes of death in offspring, including infectious/parasitic disease (MRR 1.86, 95% CI 1.07-3.23), endocrine/nutritional/metabolic diseases (MRR 3.23, 95% CI 2.02-5.17), diseases of nervous system (MRR 3.36, 95% CI 2.47-4.58), and congenital malformations (MRR 1.39, 95% CI 1.08-1.80). No excess mortality risk in offspring was observed for unnatural causes of death.

CONCLUSION:

Prenatal maternal bereavement was associated with an increased long-term mortality risk in offspring, particularly for selected natural causes of diseases and medical conditions. Our results support the fetal programming hypothesis that prenatal stress may contribute to ill health from physical diseases later in life.

KEYWORDS:

Bereavement; disease programming; mortality; pregnancy; stress

PMID:
27762181
DOI:
10.1017/S003329171600266X
[Indexed for MEDLINE]

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